The issue with copy-paste is that the navigator.clipboard browser interface only works in secure context, meaning HTTPS or 127.0.0.1/localhost. I like your suggestion of using LocalStorage, and I'll look into that, but even so that's not the big challenge. For example, there isn't really a concept of "focus" on the condition/action rows. While a copy button can be added to each rather than trying to create and track focus, I have resisted adding buttons to the rows because it makes less room for useful displayed data). And how would you paste? And where, since there's no focus? The idea assumes a lot that doesn't exist here.
I have some other ideas. Sticky header has already been on my mind, so that's a likely upgrade coming. Stay tuned...

